If this has already been suggested I do apologize, I didn't see it as a suggestion yet.

On an old game I used to play, there was a way to loan your pets to other players. I feel this would be a good thing to add that way people don't have to worry about players not returning their lions.
Basically, when transferring your lions thee would be a box you could check to make the transfer a loan.
There would be three more boxes you could check allowing the player to hunt, breed, or patrol. In the case of a lioness you could check both hunt and breed if that's what you wanted.
It would be good for players that way if they wanted someone to train their lionesses you could just check hunt, not breed.
There would also be a box where you would put in when they would be automatically returned to the original owner.
It would be a lot of coding, but it would save players from having their subs or lionesses "stolen".

Hopefully this makes sense! Any suggestions to this idea would be greatly appreciated!

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Added on ideas-

Ontop of being able to put an automated return date on your lion(ess's) page you should still be able to access a point. Example being if you'd like to retrieve the lion(ess) early you can go to your lion's page and click a button allowing you to change the date or an early return button. ~ Kiku #9052